Importance

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Abstract

The grid mat (12) is provided with an upper and an underside (25, 26), two longitudinal edges (22, 23) connecting these and transverse edges (24) and alternately adjacent depressions (16) and elevations (14) extending in a straight line at an angle to the longitudinal and transverse edges. A rectilinear first grid strut (18) extends along each of the elevations (14) of the depressions (16). Adjacent first grid struts (18) are connected by intersecting second and third grid struts (27, 28). Each first grid strut (18) extending up to the first longitudinal edge (22) has a first interruption section (42), which has a first distance (L1) from the first longitudinal edge (22), while each first grid strut (18) extending up to the second longitudinal edge (23) has a second interruption section (44), which has a second distance (L2) from the second longitudinal edge (23). In one embodiment, the second distance (L1) is less than the first distance (L2). The first grid struts (18) of two respective adjacent elevations (14) and/or two respective adjacent depressions (16) are respectively connected on both sides of their first and second interruption sections (42, 44) by further grid struts (48 to 62) forming sub-networks (46) with one another, which sub-networks (46) being interconnected by fourth grid struts (72) respectively extending parallel to the longitudinal edges (22, 23).

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First Claim